Table 5. Multivariate Cox regression analysis for predictors of return to work status (RTW).

RTW	P-value	HR	95% CI
High school	0.763	1.080	0.655–1.782
University degree	0.002	3.397	1.574–7.330
METs Physical Performance	0.447	1.091	0.871–1.367
Self employed	<0.001	2.647	1.560–4.490
HADS-D score	0.038	0.910	0.832–0.995

HR: Hazard Ratio, CI: Confidence Interval

MET: metabolic equivalent; HADS-D score: score of depression subscale of the Hospital Anxiety and Depression Scale.